Demagnetization of iron-neodymium-boron type permanent magnets w

Details Demagnetization of iron-neodymium-boron type permanent magnets w Demagnetization of iron-neodymium-boron type permanent magnets w

1989-08-24

1990-02-13

Sheehan, John P.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148120, 148121, H01F 102

Patent

active

049003747

ABSTRACT:
Hot worked, fine grain, permanent magnets of the iron-neodymium-boron type can be demagnetized by heating in air for a period of minutes at a temperature in the range of 100.degree. C. to 300.degree. C. above their Curie temperature without significant loss of coercivity.

REFERENCES:
patent: 4792367 (1988-12-01), Lee
patent: 4802931 (1989-02-01), Croat

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